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| 51. | obvious invention |
| 显而易见的发明 |
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| 52. | recommendation and examination committee for inventions |
| 发明评选委员会 |
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| 53. | The Invention of Radio |
| 无线电的发明 |
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| -- 来源 -- 英汉非文学 - 科学史 - kexueshi-wuxiandiandefaming |
好评(10) |
差评() |
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| 54. | background of the invention |
| 发明的背景 |
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| 55. | first to invent principle |
| 先发明原则 |
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| 56. | the latest thing |
| 最新发明品 |
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| 57. | The Invention of Printing |
| 印刷术的发明 |
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| 58. | scope of invention |
| 发明的范围 |
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| 59. | perfect an invention |
| 完成一项发明 |
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| 60. | work an invention |
| 实施一项发明 |
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